Neo Geo

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 Neo-Geo is the name of a cartridge-based arcade and home video game system released in 1990 by Japanese game company SNK. The system offered comparatively colorful 2D graphics and high-quality sound. A major platform for arcade games at the time, the system was also available as a costly home console. The two versions of the system were known as the AES (Advanced Entertainment System, the Home Version) and the MVS (Multi Video System, the Arcade Version).

The Neo Geo was marketed as 24-bit, though it was technically an 8/16/32-bit multiprocessing system.

• Main Processor: Motorola 68000 running at 12 MHz
  • Although the MC68000 CPU was designed by Motorola, there were many other clones of this CPU found in the Neo Geo hardware. The most common CPU is the TMP68HC000 manufactured by Toshiba.
• Co-Processor: Zilog Z80 running at 4 MHz. This is used as an audio controller.
• Sound chip: Yamaha YM2610 15 Sound Channels. 7 Digital, 4 FM synthesis, 3 PSG, and 1 Noise Channel.

Memory

• Main Memory (used directly by 68K): 64 KB
• Main Video memory : 74 KB
  • Video Memory: 64 KB
  • Palette Memory : 8 KB
  • Fast Video RAM : 2 KB
• Sound Memory (used directly by Z80): 2 KB

Display

• Display resolution: 320x224 (many games only used the centermost 304 pixels)
• Color Palette: 65,536
• Maximum Colors On-Screen: 4,096
• Maximum Sprites On-Screen: 380
• Minimum Sprite Size: 1x2
• Maximum Sprite Size: 16x512
• Maximum Sprites per scanline: 96
• Background Layers: 0
• Aspect ratio: 4:3
• A/V output: RF, composite video, RGB (with separate 21 pin SCART cable FCG-9).

Sound

• Sound CPU: Z80 at 4 MHz
• Sound hardware: YM2610 at 8 MHz, stereo sounds up to 56 kHz
• 4 channels FM (4 operators + LFO)
• 3 PSG
• 1 noise
• 7 4-bit ADPCM
• Work RAM (sound): 2KB
• Sound ROM 128KB on-board (only less than 32KB used)
• up to 512KB sound ROM on cartridges

Power

• Source: separate DC 5 V(older systems) and DC 9 V adapter (newer systems).
• Consumption: 8 W older Systems, 5 W newer Systems

Dimensions

• Console: 325 mm (width) x 237 mm (depth) x 60 mm (height).
• Controller: 280 mm (width) x 190 mm (depth) x 95 mm (height).

Storage

• Removable Memory Card: 8 KB or 68-pin JEIDA ver.3 spec memory
  • Any 68-pin memory that fits the JEIDA ver.3 spec will work